diff --git a/src/mouse_tracking/pytorch_inference/fecal_boli.py b/src/mouse_tracking/pytorch_inference/fecal_boli.py
index 0b22ed1f..b169457d 100644
--- a/src/mouse_tracking/pytorch_inference/fecal_boli.py
+++ b/src/mouse_tracking/pytorch_inference/fecal_boli.py
@@ -163,12 +163,13 @@ def infer_fecal_boli_pytorch(args):
     )
     final_fecal_boli_detections = fecal_boli_results.get_results()
     final_fecal_boli_counts = fecal_boli_counts.get_results()
-    write_fecal_boli_data(
-        args.out_file,
-        final_fecal_boli_detections,
-        final_fecal_boli_counts,
-        args.frame_interval,
-        model_definition["model-name"],
-        model_definition["model-checkpoint"],
-    )
+    if args.out_file is not None:
+        write_fecal_boli_data(
+            args.out_file,
+            final_fecal_boli_detections,
+            final_fecal_boli_counts,
+            args.frame_interval,
+            model_definition["model-name"],
+            model_definition["model-checkpoint"],
+        )
     performance_accumulator.print_performance()
diff --git a/src/mouse_tracking/tfs_inference/arena_corners.py b/src/mouse_tracking/tfs_inference/arena_corners.py
index 8314d2ad..cc9c98b3 100644
--- a/src/mouse_tracking/tfs_inference/arena_corners.py
+++ b/src/mouse_tracking/tfs_inference/arena_corners.py
@@ -113,7 +113,8 @@ def infer_arena_corner_model(args):
                 model_definition["model-checkpoint"],
             )
         px_per_cm = get_px_per_cm(filtered_corners)
-        write_pixel_per_cm_attr(args.out_file, px_per_cm, "corner_detection")
+        if args.out_file is not None:
+            write_pixel_per_cm_attr(args.out_file, px_per_cm, "corner_detection")
         if args.out_image is not None:
             render = plot_keypoints(filtered_corners, frame)
             imageio.imwrite(args.out_image, render)